EP2809497B1 - Tête d'expansion pour élargisseurs et élargisseur comprenant ladite tête d'expansion - Google Patents

Tête d'expansion pour élargisseurs et élargisseur comprenant ladite tête d'expansion Download PDF

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Publication number
EP2809497B1
EP2809497B1 EP13706170.1A EP13706170A EP2809497B1 EP 2809497 B1 EP2809497 B1 EP 2809497B1 EP 13706170 A EP13706170 A EP 13706170A EP 2809497 B1 EP2809497 B1 EP 2809497B1
Authority
EP
European Patent Office
Prior art keywords
expansion
jaws
expansion head
expanding
head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP13706170.1A
Other languages
German (de)
English (en)
Other versions
EP2809497A1 (fr
Inventor
Sebastian BÄRTHLEIN
Richard Sapper
Sven Christoph
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rehau Automotive SE and Co KG
Original Assignee
Rehau AG and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rehau AG and Co filed Critical Rehau AG and Co
Publication of EP2809497A1 publication Critical patent/EP2809497A1/fr
Application granted granted Critical
Publication of EP2809497B1 publication Critical patent/EP2809497B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/02—Enlarging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/02—Belling or enlarging, e.g. combined with forming a groove
    • B29C57/04—Belling or enlarging, e.g. combined with forming a groove using mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/02—Enlarging
    • B21D41/026—Enlarging by means of mandrels
    • B21D41/028—Enlarging by means of mandrels expandable mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/02—Belling or enlarging, e.g. combined with forming a groove
    • B29C57/04—Belling or enlarging, e.g. combined with forming a groove using mechanical means
    • B29C57/06—Belling or enlarging, e.g. combined with forming a groove using mechanical means elastically deformable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/02—Belling or enlarging, e.g. combined with forming a groove
    • B29C57/08—Belling or enlarging, e.g. combined with forming a groove using pressure difference
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/253—Preform
    • B29K2105/258—Tubular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

Definitions

  • the present invention relates to an expansion head for expansion tools for hollow workpieces, in particular for the ends of plastic pipes and metal-plastic composite pipes, wherein the expansion head comprises a cap with a radially inwardly directed guide flange and a set of sector-shaped expansion jaws, each individually by a Inner flange sector, which overlaps with the guide flange, is received radially movable in the cap, wherein the set of sector-shaped expansion jaws between a closed state and an expansion state is movable and in the closed state by an enveloping the outer walls of the set of expanding jaws approximately a cylinder jacket surface is formed ,
  • expansion heads are for example from the EP 0 718 057 A2 and the EP 0 878 287 A1 known.
  • the expansion heads consist of individual segments, the so-called spreader jaws, whose base parts are accommodated together in a cap and which are movable in the radial direction to the outside and which are separated from one another via joints.
  • Such expansion heads are attached to Aufweitwerkmaschineen and in particular connected via a screw with these.
  • the expansion tools are basically a pressing device with a mandrel which is axially displaceable in or on the housing of the pressing device and at its one axial end portion has a conical surface, and an expansion head, which is preferably fixable via a receiving device for the expansion head on the pressing device , built up.
  • the mandrel By a drive device which can be driven manually or by machine, the mandrel is moved in the axial direction in the direction of the expansion head.
  • the expansion jaws of the expansion head define a central conical seat into which engages the conical surface of the mandrel displaceable in the axial direction by the pressing device.
  • the pressing device Upon actuation of the pressing device, the mandrel is pressed into the expansion head, wherein there is a contact between the conical surface of the mandrel and the receptacle formed by the expanding jaws.
  • the expansion jaws Upon further axial movement of the mandrel in the direction of the expansion head, the expansion jaws are pressed radially outward and it comes to a radial stroke of the expansion jaws, so that the expansion jaws, the ends of a hollow workpiece, in particular a plastic pipe or a metal-plastic composite pipe, in which the expansion head is inserted widen.
  • the expansion jaws go over from the closed state to the expansion state.
  • the segments Upon radial backward movement of the mandrel out of the expansion head, the segments are returned to their home position by return means (eg, an annular tension spring or an elastic O-ring).
  • the present invention seeks to provide an expansion head that overcomes the disadvantages of the prior art.
  • the expansion head according to the invention should make a reduced effort required even with relatively thick-walled pipes even with manual operation.
  • the life of the expansion head and the expansion tools used with it should be able to be increased.
  • Another object of the present invention is to provide a corresponding expansion tool with an expansion head according to the invention.
  • the force required to perform a flaring process can be reduced if the area of the spreading jaws that bears against the inside of the tube is reduced.
  • the first widening process places high demands on the force required, while the second widening process is very easy relative to the first. Reducing the area with which the expansion jaws rests on the inside of the tube before the first expansion process, the force required for the tube expansion is more evenly distributed between the first and the second expansion process.
  • a reduction of the contact surface of the expansion jaws on the tube inside of at least 25% is required, while at a reduction of the contact surface of the expanding jaws on the tube inside of more than 75% the risk of mechanical weakening of the expansion head according to the invention occurs.
  • the present invention is to provide an expansion head for hollow tool widening tools, particularly for the ends of plastic pipes and metal-plastic composite pipes, comprising a cap with a radially inwardly directed guide flange and a set of sector-shaped spreader jaws, each individually by an inner flange sector, which overlaps with the guide flange, are received radially movable in a cap, in particular by the mecanicflanschsektor in a radial groove of the cap radially movable guided on the guide flange, wherein the set of sector-shaped expanding jaws between a closed state and an expansion state movable is and is formed in the closed state by a Umhüllende the outer walls of the set of expansion jaws approximately a cylinder jacket surface, each spreader jaw at least one i n direction of the longitudinal axis of the expansion jaws extending recess, so that the surface of the outer walls of the set of expanding jaws in the closed state of the expansion head corresponds to 25% to 75% of the area of
  • envelope of the outer walls refers to the envelope of a cylinder approximately formed by the outer walls of the expanding jaws in the closed state of the expansion head according to the invention, if the recess (s) were not present in the expanding jaws (n) and represents approximately a corresponding cylinder jacket surface.
  • the depression is arranged approximately in the middle of the outer wall of the expanding jaw. Such an arrangement of the recess allows a uniform expansion of the pipe end after the second expansion process.
  • At least one of the expansion jaws has at least two recesses.
  • the mechanical weakening the spreading jaws distributed in several places, which promotes the longevity of the expansion head according to the invention.
  • it can be of particular advantage if in each case one depression is arranged on each lateral edge of the outer wall of each spreading jaw.
  • the wells of two adjacent expansion jaws complement each other to a corresponding recess with greater width, so that a smaller contact surface of the expanding jaws on the pipe inner wall with high mechanical stability and thus longevity of the expansion head according to the invention is ensured.
  • the two each arranged on the lateral edge of the outer wall recesses each extend over the entire thickness of the expanding jaw.
  • the recesses are arranged approximately symmetrically to a center axis of the outer wall of the respective spreader jaw extending in the longitudinal direction of the expansion head. This contributes to a high mechanical stability and thus longevity of the expansion head according to the invention.
  • the expansion jaws may also be helpful if the expansion jaws have a taper or chamfer on their side facing away from the cap. As a result, a smooth transition between the flared and unexpanded portions of the hollow workpiece after the flaring operation can be achieved.
  • edges of the spreader jaws are rounded, broken or chamfered.
  • the expansion jaws during the expansion process are less strongly impressed into the material of the pipe inner wall, so that a stable pipe connection can be formed.
  • the surface of the outer walls of the set of expansion jaws in the closed state of the expansion head 40% to 60%, in particular 45% to 55% and preferably 48% to 52% corresponds to the surface of the envelope of the outer walls of Sp Schwarzbackensatzatzes , In this way, the force is distributed particularly uniformly between the first and the second expansion process.
  • FIG. 1 is an expansion head according to an embodiment of the present invention in the closed state ( Fig. 1a ) and in the open state or expansion state ( Fig. 1b to Fig. 1d ).
  • the expansion head 1 according to the invention comprises a set of six spreader jaws 4 and a union nut 2, wherein the spreader jaws 4 are guided through the opening of the union nut 2.
  • the protruding from the union nut 2 parts of the expansion jaws 4 form an approximately cylindrical Aufweit Scheme.
  • the closed state describes the outer wall 7 of the expanding jaws 4 approximately a cylinder jacket surface.
  • the term "expansion region” here refers to the region of the expansion head 1 in which the hollow workpiece to be expanded is located during the expansion process.
  • the set of sector-shaped expanding jaws 4 in the closed state of the expansion head 1 forms a closed mold with a substantially cylindrical shape in the expansion of the expansion head 1.
  • the spreading jaws 4 each have a taper 9 or chamfer, the is preferably formed as a rounded edge region. Such a taper 9 or chamfer can achieve a smooth transition between the flared and unexpanded part of the hollow workpiece after the expansion process.
  • Each of the spreading jaws 4 is formed sector-shaped and has on the outer wall 7 in a direction of the longitudinal axis of the expanding jaws 4 extending recess 8.
  • the recess 8 is formed centrally in the outer surface 7 of the expanding jaw 4 and has a semicircular cross-section. In other embodiments of the present invention, other cross sections, for example, oval, triangular, rectangular, square cross sections and combinations of said cross-sectional shapes are alternatively possible.
  • the recesses 8 of the expanding jaws 4 extend over about 30% of the surface of the envelope of the outer walls 7 of the Sp Schwarzbackensatzes in the closed state of the expansion head 1. At its lowest point, the recesses 8 have a depth of about 15% of the diameter of the expansion jaws 4 formed cylinder corresponds.
  • the in Fig. 1 a shown expansion head 1 is in Fig. 1b shown in the open state.
  • the expansion jaws 4 are each arranged offset radially outwards, so that they are now spaced from each other.
  • Each of the sector-shaped expansion jaws 4 is individually by a mecanical extension jaws 4 , which overlaps with the guide flange 3, in a radial Groove 6 guided radially movable in the cap 2.
  • the mecanicflanschsektoren 5 have on their outsides Nutsektoren, which complement each other in the entire circumference of the expansion head 1 to a circumferential groove on the outer side réelleflanschsektoren 5, in which an annular return means 10 for the return of the expanding jaws 4 from the open to the closed state of the expansion head. 1 is included.
  • the return means 10 is preferably chosen so that its restoring force is sufficient for the return of the expanding jaws 4 from the open to the closed state.
  • the return means 10 is an elastic O-ring.
  • an annular tension spring can be used advantageously.
  • In each of the réelleflanschsektoren 5 is a bore, in each of which one end of a guide pin is added.
  • the guide flange 3 In the guide flange 3 are radial guide grooves 11 ( Fig. 1 a) arranged for the reception and movement of guide pins.
  • the number of guide grooves 11 corresponds to the number of guide pins and thus the number of spreader jaws 4 of the expansion head 1.
  • the guide pins can each be firmly connected to the mecanicflanschsektoren 10 with a press fit in the associated bore in mecanicflanschsektoren 10.
  • one end of the guide pins can be screwed into a thread or be pinned to the inner flange sector 5.
  • the guide pins 8 may also be integrally formed on the respective réelleflanschsektor 10. Likewise, a leadership can be completely dispensed with.
  • a fastener is used for axial fixing of the spreading jaws 4 in the cap 2.
  • the expansion head according to the invention is a pressed-in the cap 2 mounting plate 12th used as a fastening means for the expanding jaws 4.
  • a circlip, a washer with a circlip, or a threaded washer inserted into a thread on the inside of the cap 2 may be used as fasteners.
  • the expanding jaws 4 are delimited by conical segment surfaces which, in the closed state of the expansion head 1, complement one another to form a conical surface. The opening angle of the cone segment surfaces corresponds to the cone angle of the expanding mandrel of the expansion tool.
  • the conical surface of the expanding mandrel acts together during the expansion process with the conical segment surfaces of the expansion jaws 4.
  • the conical surface of the expanding mandrel pushes the conical segment surfaces of the expanding jaws radially outward.
  • a hollow workpiece for example a plastic tube
  • the outer surfaces of the expansion head 1 initially rest on the inner side of the tube.
  • the outer surfaces of the expanding jaws 4 are moved radially outward, whereby the pipe end, which is guided over the expanding jaws 4, is widened.
  • the outer edges in the longitudinal direction of the expansion jaws 4 may be rounded or chamfered.
  • FIG. 1d A plan view of the set of expansion jaws of the expansion head according to the invention with the tube end 13 mounted thereon after such expansion process Figure 1d shown.
  • the expanded pipe end has a significant deformation 14.
  • the force required for the first expansion process is reduced compared to a first expansion operation with a conventional expansion head without recesses 8 on the outer surface 7 of the expansion jaws 4.
  • a repetition of the expansion process after a rotation of the expansion tool by about 30 ° relative to the pipe end 13, however, requires a correspondingly increased force compared to the second expansion process with conventional expansion head without recesses 8 on the outer surface 7 of the expansion jaws 4th
  • FIG. 2 shows the set of six spreader jaws 4 of an expansion head 1 according to another embodiment of the present invention in a perspective view, in turn, each having a taper 9 at one end.
  • the recesses 8 are formed approximately symmetrically to the center of the outer surface 7 and in turn have a semicircular cross-section, wherein alternatively other cross-sectional shapes can be used.
  • the recesses 8 occupy about 50% of the area of the envelope of the outer walls 7 of the Sp Schwarzbackensatzes in the closed state of the expansion head 1 a. At the lowest point, the depth of the depression corresponds to about 20% of the diameter of the cylinder formed by the expanding jaws 4.
  • FIG Fig. 3 Another set of six spreader jaws 4 of an expansion head 1 according to another embodiment of the present invention is shown in FIG Fig. 3 shown in a perspective view. Again, two each extending in the direction of the longitudinal axis of the expanding jaws 4 recesses 8 are arranged on the outer wall 7 of each of the sector-shaped expansion jaws 4 respectively. In this embodiment of the present invention, however, the depressions 8 are arranged on the lateral edge of the spreading jaws 4.
  • the recesses 8 are each designed as bevels, so that in each case two recesses 8 of adjacent expansion jaws complement to form a triangular recess. Alternatively, other cross-sectional shapes can be used.
  • the wells 8 correspond together about 30% of the area of the envelope of the outer walls 7 of the Sp Schwarzbackensatzes in the closed state of the expansion head 1. At the lowest point corresponds to the depth of the recess about 35% of the diameter of the cylinder 4 formed by the expanding jaws.
  • FIG Fig. 4 A perspective view of the set of six expanding jaws 4 of an expansion head 1 according to another embodiment of the present invention is shown in FIG Fig. 4 shown.
  • each extending in the direction of the longitudinal axis of the expansion jaws 4 recesses 8 are arranged on the lateral edge of the sector-shaped expansion jaws.
  • these have a rectangular cross section, so that the wells 8 adjacent expansion jaws complement to a likewise rectangular recess.
  • other cross-sectional shapes can also be used here.
  • the recesses 8 occupy about 25% of the area of the envelope of the outer walls 7 of the Sp Schwarzbackensatzes in the closed state of the expansion head 1 a.
  • the depth of the recess corresponds to about 10% of the diameter of the cylinder formed by the expanding jaws 4.
  • FIG Fig. 5 Another set of six spreader jaws 4 of an expansion head 1 according to another embodiment of the present invention is shown in FIG Fig. 5 shown in a perspective view.
  • the recesses 8 are again at the lateral edge of the expanding jaws 4 and are each designed as bevels.
  • two recesses 8 of adjacent spreading jaws together form a triangular-shaped recess which extends as far as the central axis of the cylinder formed by the spreading jaws 4.
  • other cross-sectional shapes can also be used here.
  • the recesses 8 together correspond to about 35% of the surface of the envelope of the outer walls 7 of the Sp Schwarzbackensatzes in the closed state of the expansion head 1. At the lowest point corresponds to the depth of the recess about 40% of the diameter of the cylinder 4 formed by the expanding jaws.
  • Fig. 6 shows a further set of six expanding jaws 4 of an expansion head 1 according to another preferred embodiment of the present invention in a perspective view. Also in this embodiment are located on the outer wall 7 of each of the sector-shaped expanding jaws 4 each extending in the direction of the longitudinal axis of the expanding jaws 4 recesses 8, which are in this embodiment of the present invention, the recesses 8 are arranged on the lateral edge of the expanding jaws 4 , The depressions 8 are each as bevels executed, which extend over the entire thickness of the spreader jaws 4, wherein mutually opposite side surfaces of the spreader jaws are arranged parallel to each other.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Earth Drilling (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Joints Allowing Movement (AREA)

Claims (10)

  1. Tête d'expansion (1) pour élargisseurs pour des pièces creuses, en particulier pour les extrémités de tubes en matière plastique et de tubes composites métal-matière plastique, comprenant:
    - une coiffe à raccord (2) avec une bride de guidage (3) orientée radialement vers l'intérieur, et
    - un ensemble de mâchoires d'expansion (4) configurées en forme de secteurs, qui sont logées chaque fois individuellement dans la coiffe à raccord (2) de façon mobile radialement par un secteur de bride intérieur (5), qui se recouvre avec la bride de guidage (3), dans laquelle l'ensemble de mâchoires d'expansion configurées en forme de secteurs (4) est mobile entre un état fermé et un état d'expansion et dans l'état fermé une surface latérale approximativement cylindrique est formée par une enveloppante des parois extérieures (7) de l'ensemble de mâchoires d'expansion (4), dans laquelle chaque mâchoire d'expansion (4) présente au moins un creux s'étendant dans la direction de l'axe longitudinal des mâchoires d'expansion (4),
    caractérisée en ce que la surface des parois extérieures (7) de l'ensemble de mâchoires d'expansion (4) correspond, dans l'état fermé de la tête d'expansion (1), à 25 % à 75 % de la surface de l'enveloppante des parois extérieures (7) de l'ensemble de mâchoires d'expansion.
  2. Tête d'expansion (1) selon la revendication 1, caractérisée en ce que le creux (8) est disposé environ au milieu de la paroi extérieure (7) de la mâchoire d'expansion (4).
  3. Tête d'expansion (1) selon la revendication 1, caractérisée en ce qu'au moins une des mâchoires d'expansion (4) présente au moins deux creux (8).
  4. Tête d'expansion (1) selon la revendication 3, caractérisée en ce qu'un creux (8) est respectivement disposé sur chaque bord latéral de la paroi extérieure (7) de chaque mâchoire d'expansion (4).
  5. Tête d'expansion (1) selon la revendication 4, caractérisée en ce que les deux creux (8) disposés respectivement sur le bord latéral de la paroi extérieure (7) s'étendent respectivement sur toute l'épaisseur de la mâchoire d'expansion (4).
  6. Tête d'expansion (1) selon la revendication 3, caractérisée en ce que les creux (8) sont disposés de façon sensiblement symétrique par rapport à un axe central de la paroi extérieure (7) de la mâchoire d'expansion respective (4) qui est orienté dans la direction longitudinale de la tête d'expansion (1).
  7. Tête d'expansion (1) selon l'une quelconque des revendications 1 à 6, caractérisée en ce que les mâchoires d'expansion (4) présentent sur leur côté situé à l'opposé de la coiffe à raccord (2) un rétrécissement (9) ou un chanfrein.
  8. Tête d'expansion (1) selon l'une quelconque des revendications 1 à 7, caractérisée en ce que les arêtes des mâchoires d'expansion (4) sont arrondies, brisées ou chanfreinées.
  9. Tête d'expansion (1) selon l'une quelconque des revendications 1 à 8, caractérisée en ce que la surface des parois extérieures (7) de l'ensemble de mâchoires d'expansion (4) correspond, dans l'état fermé de la tête d'expansion (1), à 40 % à 60 % de la surface de l'enveloppante des parois extérieures (7) de l'ensemble de mâchoires d'expansion.
  10. Elargisseur pour des pièces creuses, en particulier pour les extrémités de tubes en matières plastiques et en métaux revêtus de matières plastiques, comprenant une tête d'expansion (1) selon l'une quelconque des revendications 1 à 9.
EP13706170.1A 2012-02-03 2013-02-01 Tête d'expansion pour élargisseurs et élargisseur comprenant ladite tête d'expansion Not-in-force EP2809497B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202012100361U DE202012100361U1 (de) 2012-02-03 2012-02-03 Expansionskopf für Aufweitwerkzeuge und diesen umfassendes Expansionswerkzeug
PCT/EP2013/000311 WO2013113508A1 (fr) 2012-02-03 2013-02-01 Tête d'expansion pour élargisseurs et élargisseur comprenant ladite tête d'expansion

Publications (2)

Publication Number Publication Date
EP2809497A1 EP2809497A1 (fr) 2014-12-10
EP2809497B1 true EP2809497B1 (fr) 2015-10-07

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EP13706170.1A Not-in-force EP2809497B1 (fr) 2012-02-03 2013-02-01 Tête d'expansion pour élargisseurs et élargisseur comprenant ladite tête d'expansion

Country Status (9)

Country Link
US (1) US9327337B2 (fr)
EP (1) EP2809497B1 (fr)
CN (1) CN104093544B (fr)
AU (1) AU2013214495C1 (fr)
BR (1) BR112014016597A8 (fr)
CA (1) CA2862482A1 (fr)
DE (1) DE202012100361U1 (fr)
RU (1) RU2604373C2 (fr)
WO (1) WO2013113508A1 (fr)

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DE102013107294A1 (de) * 2013-07-10 2015-01-15 Gustav Klauke Gmbh Handarbeitsgerät und Hand-Aufweitgerät
CN103331337B (zh) * 2013-07-17 2015-11-04 徐州华恒机器人***有限公司 手持便携式散热器扁管液压胀管器及采用其的胀管***
CN104785650B (zh) * 2015-04-23 2017-01-25 江苏振光电力设备制造有限公司 一种扩径机的扩张机构
DE102015110998B4 (de) * 2015-07-08 2023-03-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren zur Herstellung einer Endrohrblende oder eines Rohrelements und Vorrichtung zur Herstellung der Endrohrblende oder des Rohrelements
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AU2013214495C1 (en) 2017-08-03
BR112014016597A2 (pt) 2017-06-13
RU2604373C2 (ru) 2016-12-10
DE202012100361U1 (de) 2013-05-06
WO2013113508A1 (fr) 2013-08-08
BR112014016597A8 (pt) 2017-07-04
CN104093544B (zh) 2017-06-09
EP2809497A1 (fr) 2014-12-10
AU2013214495A1 (en) 2014-06-12
CN104093544A (zh) 2014-10-08
US20150000368A1 (en) 2015-01-01
RU2014125806A (ru) 2016-03-27
CA2862482A1 (fr) 2013-08-08
US9327337B2 (en) 2016-05-03
AU2013214495B2 (en) 2017-03-16

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